Customizing built in Storyline360 navigation

Nothing? :)

What you exactly want to achieve? Cause i have broken down the player bit by bit the last months and if i got a clear idea what you are searching for i might be able to help.

Although this is just a first step i found references in SL-code of GSAP tween and timeline code. So it indeed feels as if GSAP is default used inside SL-code.

These functions and code i found when diving into it... not that as is, it helps directly, but might point you into the good direction.

Code:
onMouseEvent: function (t){
this.parentModel.executePlayerEvent(this.eventMap[t.type])
}

onClick: function (t){
 if (0 === t.screenX && 0 === t.screenY)
 {
 var e = this.objView.state,
 n = e.RawXPos,
 i = e.rotateXPos,
 r = e.RawYPos,
 s = e.rotateYPos;
 this.objModel.getSlide().currView.mouseX = n + i, this.objModel.getSlide().currView.mouseY = r + s
 }
 this.triggerDefaultAction()
 }